[Plato] was the first to envisage the idea of timeless existence and to emphasize it-against reason-as a reality, more [real] than our actual experience.

Every man's world picture is and always remains a construct of his mind and cannot be proved to have any other existence.

I know not whence I came, nor whither I go, nor who I am.

A careful analysis of the process of observation in atomic physics has shown that the subatomic particles have no meaning as isolated entities, but can only be understood as interconnections between the preparation of an experiment and the subsequent measurement.

In an honest search for knowledge, you quite often have to abide by ignorance for an indefinite period.

Whence come I and whither go I? That is the great unfathomable question. Science has no answer to it.

The self is not so much linked to its ancestors, it is not so much the product, and merely the product, of all that, but rather, in the strictest sense of the word, the same thing as all that: the strict, direct continuation of it, just as the self aged fifty is the continuation of the self aged forty.